From 1e9bddfd1d152e2cb133c53fe8b812945896f6d4 Mon Sep 17 00:00:00 2001
From: "Luis R. Rodriguez" <mcgrof@do-not-panic.com>
Date: Thu, 18 Oct 2012 14:06:36 -0700
Subject: [PATCH] compat: backport
 usb_autopm_[get|put]_interface_no_[resume|suspend]()

This backports these two routines:

  * usb_autopm_get_interface_no_resume()
  * usb_autopm_put_interface_no_suspend()

These routines simply increment or decrement the USB
pm usage counter without trying to either suspend or
resume.

mcgrof@garbanzo ~/compat (git::master)$ time ckmake
Trying kernel 3.5.0-030500-generic [OK]
Trying kernel 3.4.4-030404-generic [OK]
Trying kernel 3.3.7-030307-generic [OK]
Trying kernel 3.2.2-030202-generic [OK]
Trying kernel 3.1.10-030110-generic [OK]
Trying kernel 3.0.18-030018-generic [OK]
Trying kernel 2.6.39-02063904-generic [OK]
Trying kernel 2.6.38-02063808-generic [OK]
Trying kernel 2.6.37-02063706-generic [OK]
Trying kernel 2.6.36-02063604-generic [OK]
Trying kernel 2.6.35-02063512-generic [OK]
Trying kernel 2.6.34-02063410-generic [OK]
Trying kernel 2.6.33-02063305-generic [OK]
Trying kernel 2.6.32-02063255-generic [OK]
Trying kernel 2.6.31-02063113-generic [OK]
Trying kernel 2.6.30-02063010-generic [OK]
Trying kernel 2.6.29-02062906-generic [OK]
Trying kernel 2.6.28-02062810-generic [OK]
Trying kernel 2.6.27-020627-generic [OK]
Trying kernel 2.6.26-020626-generic [OK]
Trying kernel 2.6.25-020625-generic [OK]
Trying kernel 2.6.24-020624-generic [OK]

real    1m2.113s
user    3m30.573s
sys     0m31.922s

Signed-off-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
---
 compat/compat-2.6.33.c        | 43 +++++++++++++++++++++++++++++++++++
 include/linux/compat-2.6.33.h | 15 ++++++++++++
 2 files changed, 58 insertions(+)

diff --git a/compat/compat-2.6.33.c b/compat/compat-2.6.33.c
index 365a1a6ca91d..6e68db4b2ad9 100644
--- a/compat/compat-2.6.33.c
+++ b/compat/compat-2.6.33.c
@@ -9,6 +9,49 @@
  */
 
 #include <linux/compat.h>
+#include <linux/device.h>
+#include <linux/usb.h>
+#include <linux/pm_runtime.h>
+
+#ifdef CONFIG_USB_SUSPEND
+/**
+ * usb_autopm_get_interface_no_resume - increment a USB interface's PM-usage counter
+ * @intf: the usb_interface whose counter should be incremented
+ *
+ * This routine increments @intf's usage counter but does not carry out an
+ * autoresume.
+ *
+ * This routine can run in atomic context.
+ */
+void usb_autopm_get_interface_no_resume(struct usb_interface *intf)
+{
+	struct usb_device       *udev = interface_to_usbdev(intf);
+
+	usb_mark_last_busy(udev);
+	atomic_inc(&intf->pm_usage_cnt);
+	pm_runtime_get_noresume(&intf->dev);
+}
+EXPORT_SYMBOL_GPL(usb_autopm_get_interface_no_resume);
+
+/**
+ * usb_autopm_put_interface_no_suspend - decrement a USB interface's PM-usage counter
+ * @intf: the usb_interface whose counter should be decremented
+ *
+ * This routine decrements @intf's usage counter but does not carry out an
+ * autosuspend.
+ *
+ * This routine can run in atomic context.
+ */
+void usb_autopm_put_interface_no_suspend(struct usb_interface *intf)
+{
+	struct usb_device       *udev = interface_to_usbdev(intf);
+
+	usb_mark_last_busy(udev);
+	atomic_dec(&intf->pm_usage_cnt);
+	pm_runtime_put_noidle(&intf->dev);
+}
+EXPORT_SYMBOL_GPL(usb_autopm_put_interface_no_suspend);
+#endif /* CONFIG_USB_SUSPEND */
 
 #if defined(CONFIG_PCCARD) || defined(CONFIG_PCCARD_MODULE)
 
diff --git a/include/linux/compat-2.6.33.h b/include/linux/compat-2.6.33.h
index 60caab0ab806..307834adf1e8 100644
--- a/include/linux/compat-2.6.33.h
+++ b/include/linux/compat-2.6.33.h
@@ -7,6 +7,7 @@
 
 #include <linux/skbuff.h>
 #include <linux/pci.h>
+#include <linux/usb.h>
 #if defined(CONFIG_PCCARD) || defined(CONFIG_PCCARD_MODULE)
 #include <pcmcia/cs_types.h>
 #include <pcmcia/cistpl.h>
@@ -15,6 +16,20 @@
 #include <linux/firmware.h>
 #include <linux/input.h>
 
+#ifdef CONFIG_USB_SUSPEND
+extern void usb_autopm_get_interface_no_resume(struct usb_interface *intf);
+extern void usb_autopm_put_interface_no_suspend(struct usb_interface *intf);
+#else
+static inline void usb_autopm_get_interface_no_resume(struct usb_interface *intf)
+{
+	atomic_inc(&intf->pm_usage_cnt);
+}
+static inline void usb_autopm_put_interface_no_suspend(struct usb_interface *intf)
+{
+	atomic_dec(&intf->pm_usage_cnt);
+}
+#endif /* CONFIG_USB_SUSPEND */
+
 #if defined(CONFIG_COMPAT_FIRMWARE_CLASS)
 #if defined(CONFIG_FW_LOADER) || defined(CONFIG_FW_LOADER_MODULE)
 #define release_firmware compat_release_firmware
-- 
2.30.2